Acadia National Park Ascophyllum Ascophyllum nodosum Bar Harbor Beachcombing Coast Walk Fucus Knotted Wrack Maine Mount Desert Island New England Northern Rock Barnacle Other Places Sea Semibalanus balanoides Vertebrata lanosa alga barnacles climate close up close-up closeup coast coastal cold detail east coast fall flake flakes frozen hanging down ice icy ledge low tide Rockweed macro marine algae marine biology ocean outcrop rock rocky seashore seaweed snow snowfall snowflake snowflakes snowing snowstorm snowy specimen stone stony weather winter